Pipe-bending machine.



No. 888,727. PATENTED MAY 26, 1908. o. B. MORTON.

PIPE BENDING MACHINE.

APPLIOATI ON FILED SEPT. 11. 1907. a SHEETS SHEET 1" .q vitwwoeo I aw.

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IIIIIIIIIII 1 |'1 I 0. B. MORTON. PIPE BENDING MAGHINE.

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H llllfli APPLICATION FILED SEPT. 11. 1907.

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CHARLES B. MORTON, OF BUFFALO, NEW YORK.

PIPE-IBEN DIN G MACHINE Specification of Letters Patent.

Application filed September 11, 1907.

Serial No. 392,330.

To all whom it may concern:

Be it known that I, CHARLES B. MORTON, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Pipe-Bending Machines,of which the followin is a specification.

This invention rdlates to the art of bending pipes, tubing and the like,and has for its object to provide an improved machine for bending thework in a convenient and satisfactory manner. It is also proposed toprovide for bending the work upon several arcs Without requiring anyadjustment of the machine.

Another object of the invention is to have the machine under thecomplete control of the operator for starting and stopping the mach1ne,and to provide for the automatic reversing of the machine at thecompletion of each bending operation.

With these and other objects in view, the present invention consists inthe combination and arrangement of parts as will be hereinafter morefully described, shown in the accompanying drawings and particularlypointed out in the appended claims, it being understood that changes inthe form, proportion, size and minor details may be made within the seec of the claims without'departing from tli the advantages of theinvention.

In the drawings,Figure 1 is an elevation of a bending machine embodyingthe features of the resent invention. Fig. 2 is an enlarged etail topplan view, arts of the table being broken away to disc ose the startingand stopping mechanism. Fig. 3 is an enlarged front elevation of themachine. 4 is a detail sectional view taken through the bending rolls. 1

For the support of the operating parts of the present machine there isprovided a table or frame including a top 1 supported upon suitable lestandards 2. Risin from the table top a cut midway between its endsadjacent one side thereof is a stub shaft 3 upon which are looselymounted a series of bending rolls, there being three rolls shown in thepresent drawings and designated 4, 5 and 6, the said rolls progressingin diameter upwardly, each roll being provided with a peripheral groove.Through the table top there is formed an arcuate slot 7 struck from espirit or sacrificing any of Fig.

the stub shaft 3 as a center and slightly exceeding a semicircle inlength. Working in this slot is a shaft 8 upon which are fixed threebending rolls 9, 10 and 11 which progress in diameter downwardly. Theserolls are peripherally grooved and successively bear against theperipheries of the other rolls, the diametric progression of one set ofrolls being the reverse of the other set of rolls. The upper ends of thetwo shafts are connected by a link or bar 12 so as to brace the shaftsand maintain the shaft 8 in proper relation to the shaft 3 when theformer shaft is working sidewise in the slot 7.

Just beyond the inner endof the slot 7 there is a shaft 13 which dependsfrom the table and carries a crank arm 14, which is in the nature of acam in which is a slot 15 concentric with the cam and through which isreceived the lower end of the shaft 8. the shaft 13 is turned so as toswing the crank arm 14 from its position shown in Fig. 2 towards theleft hand side of the machine, it is apparent that the shaft 8 will bemoved sidewise through the slot 7 around the stub shaft 3 as a center.If a piece of work be thrust into the registering grooves of thecooperating bending rolls, such piece of work will be bent around one ofthe rolls on the shaft 3 by the movement of the other roll around theshaft .3 as a center.

For the purpose of o crating the shaft 13,

there is a substantially h 16 which extends inwardly beneaththe back ofthe table and is provided upon its inner end with a beveled gear 17meshing with a beveled gear 18 carried by the lower member of a clutch19 upon the shaft 13. As best shown in Fig. 2 of the drawings, it willbe seen that the outer end of the shaft 16 is provided with a large gear20 in'mcsh with a smaller gear or inion '21 upon a power shaft 22, thelatter eing provided with loose pulleys 23 and 24 which are driven inreverse directions by any suitable means. Between these pulleys is aclutch 25 capable of being successively thrown into engagement with thepulleys so as to rotate the power shaft 22 in either direction.

In order that the clutch may be conveniently controlled, a push rod 26is connected thereto and leads horizontally towards and beneath thetable where it terminates ina transverse arm 27 extending towards theorizontal drive-shaft- Patented May 26, 1908.

,When

shaft 22. Suitably hung beneath the table top there is a shaft 28provided upon its inner end with a cam 29 in coopcrz-ttive relation withthe free end of the arm 27 so as to move the push rod 26 endwisc whenthe cam is rotated in one direction, thereby to move the clutch 25either to the intermediate position between the pulleys 23 and 24 orinto en gagement with the pulley 23. A suitable spring 30 is employedand connected to the push rod 26 so as to exert a tendency to draw theclutch 25 towards the pulley 24.

At the front of the machine and adjacent the floor there is a treadle 31from which rises a connecting rod 32 having its upper end connected to aratchet lever 33 fulcrumed u Jon the shaft 28 and engaging aratchet-wheel 34 carried by the shaft. By Working the treadie 31, theshaft 28 may be rotated so as to rotate the cam 29 and thereby operatethe push rod 26.

Working in the arcuate slot 7 there is a trip slide 35, to the underside of which a trip arm 36is connected. Between the trip arm 36 and thefront of the table there is a lever 37 fulcrumed between its ends upontheunder side of the table and having its inner end provided with a pin38 working in a bifurcation 39 in the free end of the trip arm 36. Theouter end of the lever 37 is connected to the upper end of aratchet-lever 39 fulcrumed upon the shaft 28 and engaging a ratchetwheel40 carried by the shaft 28. When the movablebending rolls have beenswung to the left until their shaft 8 enga es the trip slide 35, thelatter will be move to the left thereby carrying the trip arm 36 to theleft and swinging the inner end of the lever 37 to the left. Thismovement of the lever 37 operates the ratchet lever 39 which in turnrotates the shaft 28 and causes the cam 29 to work against the arm 27 onthe push rod 26 and thereby shift the clutch 25 to a positionintermediate the pulleys 23 and 24 so as to stop the machine. It willnow be understood that the stop ing of the machine is antomaticallycontro led, and the trip member 35 may be set to any position in theslot 7 so as to stop the machine when the movable set of bending rollshas moved to any predetermined distance around the stationary set of011?i thereby to regulate the length of the With the clutch between thetwo pulleys, the treadle 31 is manipulated to further ro tate the cam 29so as to. throw the clutch into engagement with the other ulley, therebyto reverse the rotation of the s iaft 13, where by the cam 14, togetherwith the set of swinging rolls, will be swung back to their positions,as shown in Fig. 2, until the free end of the arm 14 strikes an endwisemovable bar 41 hun from the table top and connected to a ratchet lever42 fulcrumed u on the shaft 28 and engaging a ratchet whee 43, wherebythe shaft 28 will be rotated so as to turnthecam 29, which in turn willoperate the rod 26 to shift the clutch 25 to an intermediate osition outof engagement with the pul eys, whereby the operation of the machinewill be sto ped.

n rear of the bending rolls there is a suitable stop-gage 44 which isadjustable towards and away from the rolls and is designed to limit theendwise clutch thrust of the work between the rolls when placing thework in position.

Having thus described the invention, what is claimed is 1. A bendingmachine having a su )port, a fixed bending roll mounted thereon, t etable having an arcuate slot concentric with the fixed roll, a movablebending roll having a shaft working in the slot, and operating meansincluding a cam working against the shaft of the movable roll to worksaid shaft throu h the slot.

2. bending machine having a fixed bending roll, a movable bending rollworking about the fixed roll, operating means for the movable bendingroll, and a trip in the path of the movable bending roll and connectedwith the operating means to control the same.

3. A bending machine having a fixed bending roll, a movable bending rollworking around the fixed roll, operating means for the movable roll, anda movable trip device in the path of the movable bending roll andassociated with the operating means for stepping the operationof themachine.

4. A bending machine comprising a table having an arcuate slot, a fixedbending device upon the table, concentric with the slot, a movablebending device working around the fixed device in cooperative relationthereto and guided by the slot, operating means for the movable bendingdevice, and a tri located in the slot in the path of the movab e bendingdevice and associated with the o crating means to stop the movement oftl fe movable bending device.

5. A bending machine comprising a table having an arcuate slot, a fixedbending device concentric with the slot, a movable bending device havingan axis guided in the slot, operatin means including a cam workingagainst t e axis to actuate the movable bending device, and a trilocated in the slot in the path of the movab e device and associatedwith the operating means to stop the operation of the machine.

6. A bending machine comprising a table having an arcuate slot, a fixedbending device concentric with the slot, a movable bending device havingan axis guided in the slot, operatingL means including a cam workingagainst t c axis to actuate the movable bending device, a trip locatedin the slot in the path of the movable device and associated With theoperating means to sto the operaname to this specification in thepresence of tion of the machine, a reversing evice for the 1 twosubscribing witnesses. operating means, and a trip device in the i rpath of the return movement of the cam and CHARLES MOB 5 associated Withthe operating means for Witnesses:

sto ping the operation of the machine. MARGARET A. MORTON,

n testimony whereof I have signed my DANIEL J. HURLEY.

